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x402 MCP server for AI agent payments. Gasless USDC micropayments on Base L2. Claude, Cursor, LangChain, CrewAI, AutoGen, LangGraph resolve HTTP 402 with no API keys. Non-custodial, settlement-provider-agnostic, 0% fee.

Setup

Choose your client, copy the config, then fill in any required environment variables.

Add to CursorAdd to VS Code

Local

claude mcp add xenarch --env XENARCH_PRIVATE_KEY='<XENARCH_PRIVATE_KEY>' -- npx -y @xenarch/agent-mcp

Remote

claude mcp add --transport http xenarch https://xenarch-mcp--xenarch.run.tools

Environment variables

  • XENARCH_PRIVATE_KEY

Replace the placeholders with your own credentials and keep them out of version control.